org.hibernate.criterion
Interface Projection

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

AggregateProjection, AliasedProjection, AvgProjection, CountProjection, Distinct, IdentifierProjection, ProjectionList, Property, PropertyProjection, RowCountProjection, SimpleProjection, SQLProjection

public interface Projection
extends java.io.Serializable

An object-oriented representation of a query result set projection in a Criteria query. Built-in projection types are provided by the Projections factory class. This interface might be implemented by application classes that define custom projections.

Author:

Gavin King

See Also:

Projections, Criteria

toSqlString

java.lang.String toSqlString(Criteria criteria,
                             int position,
                             CriteriaQuery criteriaQuery)
                             throws HibernateException

Render the SQL fragment

Parameters:

criteriaQuery -

columnAlias -

Returns:

String

Throws:

HibernateException

toGroupSqlString

java.lang.String toGroupSqlString(Criteria criteria,
                                  CriteriaQuery criteriaQuery)
                                  throws HibernateException

Render the SQL fragment to be used in the group by clause

Parameters:

criteriaQuery -

columnAlias -

Returns:

String

Throws:

HibernateException

getTypes

Type[] getTypes(Criteria criteria,
                CriteriaQuery criteriaQuery)
                throws HibernateException

Return types returned by the rendered SQL fragment

Parameters:

criteria -

criteriaQuery -

Returns:

Type[]

Throws:

HibernateException

getTypes

Type[] getTypes(java.lang.String alias,
                Criteria criteria,
                CriteriaQuery criteriaQuery)
                throws HibernateException

Return types for a particular user-visible alias

Throws:

HibernateException

getColumnAliases

java.lang.String[] getColumnAliases(int loc)

Get the SQL select clause column aliases

getColumnAliases

java.lang.String[] getColumnAliases(java.lang.String alias,
                                    int loc)

Get the SQL select clause column aliases for a particular user-visible alias

getAliases

java.lang.String[] getAliases()

Get the user-visible aliases for this projection (ie. the ones that will be passed to the ResultTransformer)

isGrouped

boolean isGrouped()

Does this projection specify grouping attributes?